A cracked or grimy downstem can throw off the whole water pipe. This clear replacement downstem from Superbee gets your setup back to running smoothly. The downstem carries smoke from the bowl down into the water. A fresh, clean one keeps the draw smooth and the water doing its job. Before you buy, check the joint size and length on your current downstem so the new one seats snugly. Clean it regularly with a glass cleaner and a warm-water rinse.